GEO 211 1st Edition Lecture 32 Outline of Last Lecture I Chapter 15 Hurricanes A Region Local Names B Hurricanes compared with mid latitude cyclones C Hurricanes derive Energy from tropical warm oceans Outline of Current Lecture II Hurricane formation A Stages of development 1 Tropical disturbance 2 Tropical depression 3 Tropical storm 4 Hurricane B Saffirr Simpson scale for hurricanes potential damage Current Lecture II Hurricane formation Begins with convergence and rising of surface winds warm ocean water Wavelike disturbance develops called easterly wave East side of dashed line surface wins converge and rise o Brings cloudy weather West wide of the dashed line surface wind sinks to surface and diverges Brings sunny weather A Stages of development 1 Tropical disturbance disorganized cluster of tropical thunderstorms slight no circulation 2 Tropical depression organized cluster of tropical thunderstorms with weak cyclonic circulation less than 3 mph These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute 3 Tropical storm tropical cyclone with highest sustained cyclonic winds at center between 39 74 mph 4 Hurricane tropical cyclone with cyclonic winds at the center of at least 74 mph B Saffirr Simpson scale for hurricanes potential damage 1 74 95 mph minimal 2 96 110 mph moderate 3 111 130 mph extensive 4 131 155 mph extreme 5 155 mph catastrophic 3 4 5 are considered major hurricanes
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